Who are you in Christ? You are baptized into Christ (Gal 3:27), that is, you are immersed in Him. You live in Him, and at the same time He lives in you (see Jn 6:56; 17:23).
You are sons and daughters of God (Gal 3:26). "You did not receive a spirit of slavery leading you back into fear, but a spirit of adoption through which we cry out, 'Abba!' (that is, 'Father')" (Rm 8:15). "See what love that Father has bestowed on us in letting us be called children of God! Yet that is what we are" (1 Jn 3:1).
"But if we are children, we are heirs as well: heirs of God, heirs with Christ, if only we suffer with Him so as to be glorified with Him" (Rm 8:17). You are heirs of "all that was promised" (Gal 3:29). God chose "those who are poor in the eyes of the world to be rich in faith and heirs of the kingdom He promised to those who love Him" (Jas 2:5).
You "have clothed yourselves with" Christ (Gal 3:27). You have put on the Lord Jesus (Rm 13:14). You are clothed with power (Lk 24:49), love (Col 3:14), and humility (1 Pt 5:5).
You are one with all the baptized (Gal 3:28). In one Spirit, you have been baptized into one body (1 Cor 12:13). You can be of one mind and one heart with all Jesus' disciples (Acts 4:32). You can even be one as Jesus and the Father are one (Jn 17:21).
In Baptism, you are new creations (see Gal 6:15), adopted sons and daughters of God, members of Christ's body (1 Cor 12:12), and heirs of His kingdom. You are chosen, called, beloved, free, holy, and united with the Lord.